Trustworthy

Apart from a few faults, he is a trustworthy partner.

You should have your house built by a trustworthy builder.

You should associate with people who you believe are trustworthy.

I believe that he's trustworthy.

I erred in thinking him trustworthy.

I was mistaken in thinking that he was a trustworthy man.

He is a man of strong, stable and trustworthy character.

He is trustworthy.

He might be young but he's trustworthy.

He is a good fellow for sure, but not trustworthy.

The storage of cryptographic secrets is one of the paramount requirements in building trustworthy systems.